There is a compelling need for prospective, properly controlled studies in women with epilepsy (WWE) during pregnancy to improve maternal and child outcomes. The proposed investigations are pertinent to the National Institute of Neurological Disorders and Stroke Epilepsy Research Benchmarks and will address multiple gaps in our knowledge noted by the recent American Academy of Neurology guidelines. This multicenter investigation will employ a prospective, observational, parallel-group, cohort design with an established research team.